.footerBox {
    display: inline-block;
    margin: 10px 0;
    position: absolute;
    bottom: 20px;
    left: 20px;
    width: 360px;
    height: 40px;
    line-height: 40px;
    border: 1px solid black;
}

.btnPlus {
    position: absolute;
    right: 10px;
    top: 8px;
}

.btnPlus:hover {
    background-color: #000;
    color: #fff;
}
